fix: generate sitemap.xml in eleventy.after hook instead of template

The @quasibit/eleventy-plugin-sitemap shortcode triggers
TemplateContentPrematureUseError on paginated templates in Eleventy 3.x.
Move sitemap generation to eleventy.after hook which scans the output
directory for index.html files after all templates are rendered. Remove
the plugin import/registration and the sitemap.njk template.

eleventy.config.js

@@ -2,7 +2,7 @@ import pluginWebmentions from "@chrisburnell/eleventy-cache-webmentions";
 import pluginRss from "@11ty/eleventy-plugin-rss";
 import embedEverything from "eleventy-plugin-embed-everything";
 import { eleventyImageTransformPlugin } from "@11ty/eleventy-img";
-import sitemap from "@quasibit/eleventy-plugin-sitemap";
+
 import markdownIt from "markdown-it";
 import markdownItAnchor from "markdown-it-anchor";
 import syntaxHighlight from "@11ty/eleventy-plugin-syntaxhighlight";
@@ -352,12 +352,6 @@ export default function (eleventyConfig) {
     return eleventyConfig.htmlTransformer.transformContent(this.outputPath, content, this);
   });
 
-  // Sitemap generation
-  eleventyConfig.addPlugin(sitemap, {
-    sitemap: {
-      hostname: siteUrl,
-    },
-  });
 
   // Wrap <table> elements in <table-saw> for responsive tables
   eleventyConfig.addTransform("table-saw-wrap", function (content, outputPath) {
@@ -674,29 +668,6 @@ export default function (eleventyConfig) {
     });
   });
 
-  // Exclude pages from sitemap by URL pattern
-  // Usage: collections.all | excludeFromSitemap
-  eleventyConfig.addFilter("excludeFromSitemap", (items) => {
-    const excludePatterns = [
-      /^\/replies\//,
-      /^\/feed\.(xml|json)$/,
-      /\/feed\.(xml|json)$/,
-      /^\/categories\//,
-      /^\/digest/,
-      /^\/webmention-debug\//,
-      /^\/404\.html$/,
-      /^\/sitemap\.xml$/,
-      /^\/dashboard/,
-      /^\/homepage/,
-      /^\/search\//,
-      /^\/graph\//,
-    ];
-    return items.filter((item) => {
-      const url = item.url || "";
-      return !excludePatterns.some((pattern) => pattern.test(url));
-    });
-  });
-
   // Slugify filter
   eleventyConfig.addFilter("slugify", (str) => {
     if (!str) return "";
@@ -1426,6 +1397,54 @@ export default function (eleventyConfig) {
       }
     }
 
+    // Sitemap generation — scan output HTML files, exclude URL patterns
+    if (!incremental) {
+      const sitemapOutputDir = directories?.output || dir.output;
+      const excludePatterns = [
+        /^\/replies\//,
+        /\/feed\.(xml|json)$/,
+        /^\/categories\//,
+        /^\/digest/,
+        /^\/webmention-debug\//,
+        /^\/404\.html$/,
+        /^\/dashboard/,
+        /^\/homepage/,
+        /^\/search\//,
+        /^\/graph\//,
+        /^\/sitemap\.xml$/,
+      ];
+      try {
+        const walkHtml = (base, prefix = "") => {
+          const entries = [];
+          for (const entry of readdirSync(resolve(base, prefix), { withFileTypes: true })) {
+            const rel = prefix ? `${prefix}/${entry.name}` : entry.name;
+            if (entry.isDirectory()) {
+              entries.push(...walkHtml(base, rel));
+            } else if (entry.name === "index.html") {
+              const urlPath = prefix ? `/${prefix}/` : "/";
+              entries.push(urlPath);
+            }
+          }
+          return entries;
+        };
+        const allUrls = walkHtml(sitemapOutputDir)
+          .filter((url) => !excludePatterns.some((p) => p.test(url)))
+          .sort();
+        const xmlLines = [
+          '<?xml version="1.0" encoding="UTF-8"?>',
+          '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">',
+        ];
+        for (const url of allUrls) {
+          xmlLines.push(`  <url><loc>${siteUrl}${url}</loc></url>`);
+        }
+        xmlLines.push("</urlset>");
+        writeFileSync(resolve(sitemapOutputDir, "sitemap.xml"), xmlLines.join("\n"));
+        console.log(`[sitemap] Generated sitemap.xml with ${allUrls.length} URLs`);
+      } catch (err) {
+        console.error("[sitemap] Generation failed:", err.message);
+      }
+    }
+
     // Pagefind indexing — run exactly once per process lifetime
     if (!pagefindDone) {
       pagefindDone = true;

sitemap.njk

@@ -1,7 +0,0 @@
----
-permalink: /sitemap.xml
-layout: null
-eleventyExcludeFromCollections: true
----
-{% set sitemapItems = collections.all | excludeFromSitemap %}
-{% sitemap sitemapItems %}